His design. Not only does it stray from the usual designs that they’ve stuck with by adding a trenchcoat, but also with his general appearance. He looks more human than they have in the past, bringing us fans closer to the robots themselves.
His optics. Hnnnng those things can stare into your soul
and down your shirt. I’ve always liked how they kept each design individual, and I just… I love his in particular. And if anyone doesn’t think his lazy-eye is adorable can get out of my face.
His personality, particularly his lack of true loyalty. I always thought it was weird how none of the Autobots ever legitimately questioned Optimus, and he FINALLY broke that streak of blind obedience. Now, he still follows orders which means he still maintains respect for the Prime, despite his lacking trust.
As well as that, I like the fact that he tries to chicken out multiple times and he doesn’t seem to pleased to have to save Optimus. I don’t really think it’s because he wants to take over, but rather his fear of death and/or laziness. This character is literally the closest thing we’ve had to an anti-hero so far and I love it.
He’s Australian. That’s it. That’s all I got. His voice is sexy and I could listen to it all day. That’s all.
His weapons aren’t actually PART of him. They’re separate parts, though they still transform with him. They’re add-ons. I love that. Ironhide’s cannons are awesome and all, but he pulls out his guns from a holster. He FLIPS HIS TRENCH BACK TO GET HIS GUNS. He’s literally the biggest over dramatic dork that wants to look cool
and succeeds ever.